4-17. EMERGENCY BRAKE VALVE (cont)
CLEANING, INSPECTION, AND REPAIR
Drycleaning solvent P-D-680 is toxic and flammable. Wear
protective goggles and gloves and use only in a well-ventilated
area. Avoid contact with skin, eyes, and clothes and don't
breathe vapors. Do not use near open flame or excessive heat.
The flash point is 100-138°F (38-59°C). If you become dizzy,
get fresh air and medical aid immediately. If contact with eyes
is made, wash your eyes and get medical aid immediately.
Compressed air used for cleaning purposes will not exceed 30
psi (207 kPa). Do not direct compressed air against skin. Use
goggles or full face shield.
5. Use a cloth dampened with drycleaning solvent and remove grease and oil from exterior and interior of body.
6. Use drycleaning solvent and clean metal parts. Dry with compressed air.
7. Inspect metal parts for cracks, breaks, cuts, or other damage. Replace damaged parts.
8. Check that spring (2) has not rusted, become distorted, or taken a permanent set. Replace damaged spring.
9. Discard valve seat (6) and cotter pins (8) and replace with new valve seat and cotter pins.
10. Check that valve (7) and valve stem are not bent. Replace damaged valve.
11. Use brake cylinder lubricant and lubricate pins (9), upper and lower parts of valve stem, and spring (2).
Valve assemblies are under a spring load. Use caution during
assembly procedures so that no parts fly out, causing injury to
12. Install valve lever (11) and operating lever (10) on body (12). Secure with two pins (9) and two cotter pins (8).